How to Remove a SIM Card Lock From the Palm Centro for AT&T

Most GSM cellular-service providers in the United States contain a SIM lock to prevent the phone from being used on other networks. Unlocking your cell phone makes it usable with a SIM card from another provider, allowing you to switch providers without having to scrap your phone. It can reduce phone costs while travelling abroad, as you could buy a prepaid SIM from a local provider to use in your phone and not have to pay international roaming rates to your domestic carrier.

Instructions

1. Place a Subscriber Information Module, or SIM, card in the phone if it doesn't already have one.

2. Enter "*#06*" (without the quotation marks) on the phone's dialer and push the send button to display the phone's IMEI number, its unique identifier.

3. Enter the IMEI number into a website that will find your unlock code. Many sites provide unlock codes for a fee.

4. Enter "*#*#" and then your unlock code and then "#" on your phone's dialer. Press the send button.

Tips & Warnings

• You can place any SIM card in the phone to unlock the phone.

• Unlocking an AT&T-branded Palm Centro likely will void your warranty and may result in AT&T's refusal to provide technical support for the phone.

References

• How To Unlock a AT&T Palm Centro

Resources

• Unlock to Talk unlock codes
• Phone Card Mall unlock codes
• Rebel Simcard